The issue of the recent spate of incursions by Chinese troops was raised in the Lok Sabha on Monday by members cutting across party lines. Defence minister AK Antony, while replying to the questions, said in the last three years since January 2010, there have been 28 violations of Indian airspace
by other countries which are taken up with them.

"There is no commonly delineated Line of Actual Control (LAC) between India and China. There are areas along the border where India and China have different perceptions of the LAC and both sides undertake patrols up to their respective positions there," he said.

The minister added that on account of differences in perception of the LAC, certain transgressions do take place on the ground. The government regularly takes up any transgression with the Chinese side through established mechanisms.

Asked whether the Chinese have blocked developmental work in Indian territory, Antony said: "The government takes adequate measures to safeguard sovereignty, territorial integrity and security of India by reviewing the threat perception from time to time and takes appropriate steps to meet the threats."

He also said that the developmental work in the border areas was being carried out through close coordination between security forces and the local administration.

The MPs who raised the questions include Saugata Roy of the TMC, Anurag Thakur of the BJP, the SP's Neeraj Shekhar and Arjun Meghwal of the BJP.